A year ago, the White House led the effort to get automakers' Corporate Average Fuel Economy to 35.5 miles per gallon by 2016. Although the number was eventually pegged at 34.1 mpg, it will actually be slightly lower because of other non-automotive credits that will be applied. One might have thought automakers would still be grousing the work that needs to be done, but in fact they encouraged the federal government to go further, and so it has: the White House began working this week on setting